javascript中的最大和最小数组值

Question

我想获得数组中的最高值和最低值，但这不起作用。

var arr1 = new array();

<?php 
$temp = 0;
foreach ($y->result() as $get)
{
    ?>
        arr1[<?php echo $temp;?>] = "<?php echo $get->hits;?>";
    <?php
    $temp++;
}
?>

var maxim = arr1.max();
var minim = arr1.max();